Polymer Technology Multiple Choice Questions - Set 15 - ObjectiveBooks

Polymer Technology Multiple Choice Questions - Set 15

Practice Test: Question Set - 15

1. Elastomers are
    (A) Thermosetting material
    (B) Exemplified by protein derivatives
    (C) Having high flexural strength
    (D) Having very high tensile strength and heat resistance

2. Pick out the wrong statement.
    (A) Polystyrene is a thermoplastic polymer
    (B) Protein is a natural polymer
    (C) Neoprene is a natural rubber
    (D) Polythene is a copolymer, while SBR is a homopolymer

3. Typical solvent polymerization reaction conditions for the production of high density polythene by Zeigler process is
    (A) 7 kgf/cm2 and 70 °C
    (B) 1000 kgf/cm2 and 100°C
    (C) 7 kgf/cm2 and 700°C
    (D) 1 kgf/cm2 (gage) and 70°C

4. Silicone is a/an
    (A) Monomer
    (B) Inorganic polymer
    (C) Thermoplastic material
    (D) A natural polymer

5. Catalyst used in the production of high density polythene by low pressure Ziegler process is
    (A) Aluminium triethyl activated with TiCl4
    (B) Platinum
    (C) Molybdenum
    (D) Nickel

6. __________ fibres are made of polyamides.
    (A) Dacron
    (B) Nylon
    (C) Rayon
    (D) Orion

7. In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher
    (A) Densities
    (B) Melting point
    (C) Tensile strength
    (D) Hardness, rigidity & brittleness

8. A chain growth polymerization reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerization reaction is not involved in the manufacture of
    (A) Siloxane elastomers
    (B) Polyamides
    (C) Vinyl polymers
    (D) Urea-formaldehyde resins

9. Thermal pyrolysis of ethylene dichloride produces
    (A) Trichloroethylene
    (B) Vinyl chloride
    (C) Ethanol amine
    (D) Ethylene oxide

10. Which of the following is stretched into fibres?
    (A) Saturated polyester
    (B) Unsaturated polyester
    (C) Isoprene
    (D) Bakelite

11. Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the
    (A) Electrical insulation purpose
    (B) Tanning of leather
    (C) Strengthening of plaster of Paris
    (D) Decorative laminates

12. Terylene is
    (A) Same as Dacron
    (B) A polyester
    (C) Both (a) & (b)
    (D) Neither (a) nor (b)

13. In case of wet spinning of polymers, the polymer solution is forced through spinnerates into, a coagulating bath to give a filament form. Wet spinning is not used in case of the __________ fibres.
    (A) Viscose rayon
    (B) Acrylic
    (C) Polyvinyl acetate
    (D) Saturated polyester

14. Which of the following is the lowest cost plastic commercially available?
    (A) Polythene
    (B) Teflon
    (C) Bakelite
    (D) PVC

15. Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA)?
    (A) Perspex
    (B) Lucite
    (C) Plexiglass
    (D) Teflon

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